Detachable-calk horseshoe.



No. 828,296; PATENTED JUNE 12., 1906. W. E. SHAW. DETAGH ABLB OALKHORSE-SHOE,

APPLICATION FILED AUG.29,1905.

4 SHEET$-SHEET 1.

PATENTBD JUNE 12, 1906 W. E. SHAW.

DETAGHABLE GALK HOESESHOB.

APPLICATION FILED AUG. 29, 1905.

4 SHEETS*#SHEET 2.

No. 823,296. PATENTED JUNE 12, 1906.

W'. B. SHAW.

DETAUHABLE GALK HORSESHOE.

APPLICATION FILED AUG. 29, 1905.

4 SHEETSSHEET 3.

ANDREW a era-mm co, Pmm-umommms. WASMNGYUN o e PATENTED JUNE 12, 1906.

W. B. SHAW. DETAOHABLE GALK HORSESHOE.

APPLICATION FILED AUG. 29, 1905.

4 $HEETS-SHEET 4.

UNITED STATES PATENT OFFICE.

VVILLIAM E. SHAW, OF SAN F RANOISOO, CALIFORNIA, ASSIGNOR OF ONE-DETACHABLE-OALK HORSESHOE.

Specification of Letters Patent.

Patented June 12, 1906.

Application filed August 29, 1905. Serial No. 276,205

To all whom it may concern:

Be it known that 1, WILLIAM E. SHAW, of San Francisco, in the county ofSan Francisco and State of California, have invented certain new anduseful Improvements in Detachable-Calk Horseshoes, of which thefollowing is a specification.

This invention relates to horseshoes, and has particular reference tothat type in which the calks are made detachable, so that they may bereadily replaced by new.ones when worn out.

One of the objects of this invention is to provide a horeshoe with acalk, particularly the toe-calk, having a plurality of parts whichinterlock with similarly-formed parts on the shoe, the interlockingmovement being a lateral one relatively to the calk or in the directionof the outline of the shoe itself.

Another object of the invention is to provide interchangeable spur-calksand rubberfaced or padded calks having duplicate attaching-bases,whereby they may be readily substituted one for another on the shoe.

Another object of the invention is to provide calks having attachingmeans wider at one end than the other, whereby they will wedge firmly inplace, the shape of the interlocking parts of the shoe and theheel-calks being such as to oppose the thrust of astumble or a blowresulting from striking an obstruction.

Another object of the invention is toprovide horseshoes with detachablecalks, the heel-calks having inclined interlocking portions, thedirection of inclination being upward and rearward to oppose thepressure of the forward pullof the horse, said direction of inclinationalso opposing movement that would tend to release the wedging grip ofthe members.

Of the accompanying drawings, Figure 1 is an under plan view of ahorseshoe embodying my invention, the toe-calk being partially moved toone side in the position which it would occupy during the attaching orde-' taching movements and one of the heel-calks being separated fromthe shoe. Fig. 2 represents a side elevation of the same. Fig. 3 is apartial plan view of the same, the heelcalk being shown as detached andthe toe-calk being shown by full lines in secured position and by dottedlines in the position which it occupies when freed from the Wedging gripand ready to be removed. Fig. 4 is a front elevation of the shoe. Fig. 5is a rear elevation of the same. Fig. 6 is a perspective view of thetoe-calk detached. Fig. 7 is a perspective view of one of the heel-calksand one end of the shoe. Fig. 8 represents a section on line 8 8 of Fig.3. Fig. 9 is a view similar to Fig. 8, the toe-calk being removed. Fig.10 is adetail section on line 10 10 of Fig. 1. Fig. 11 is a view similarto Fig. 8, but illustrating a modification hereinafter described. Figs.12 to 16, inclusive, are views similar to Figs. 1 to 5, inclusive,showing the same shoe, but with the padded calks substituted for thesharpened calks. Fig. 17 is a view similar to Fig. 10, but showing thepadded calk. Fig. 18 is a view similar to Fig. 7, but showing a paddedcalk. Fig. 19 is a View similar to Fig. 8, but showing a padded calk.Fig. 20 is a perspective view of the padded toecalk.

Similar reference characters indicate the same parts in all the figures.

The body of the horseshoe is provided with the usual nail-holes and clip26 to bear against the front of the hoof. The upper face of the toeportion of the shoe is formed with a recess 27, terminating in ashoulder 28, and an outer recess 29, terminating in a shoulder 30, saidshoulders 28 and 30 serving as stops to limit the lateral movement ofthe toe-calk in one direction. In cross-section the toe portion of theshoe tapers laterally from the center, so that when the toe-calk ismoved from the position shown by full lines in Fig. 3 to the dotted-lineposition its lips or ribs presently described may be disengaged from therecesses 27 and 29. The toe portion of the shoe is formed with an underrib 31, having an undercut recess 32 in its front.

The body 33 of the toe-calk is formed with an inner lip or rib 34 to fitthe recess 27 of the shoe and with an outer lip or rib 35 to fit therecess 29 of the shoe and with an intermediate lip or rib 36 to fit theundercut recess 32, formed in the rib 31 of the shoe. The groovesbetween the ribs or lips of the toecalk taper sufficiently so that whenthe toe calk is moved from the position shown by dotted lines in Fig. 3to the full-line posit on the interlocking parts, comprising the ribsand recesses described, will fit tightly, so that the toe-calk ispractically wedged 1n place when its end abuts against thestop-shoulders 28 and 30.

The sharpened toe-calk illustrated is preferably provided with twosharpened projecting portions 37 and an intermediate recessed andsharpened portion 38. This construction provides one which will presenta sharp edge even after considerable wear, because as the portions 37wear down the sharp por tion 38 will come in contact with the ground.

As an additional means to prevent the toecalk from accidentally slippingso as to become loose after it has been wedged in place I may providethe body of the toe-calk with a hole 39 and the body of the horseshoewith a recess 40. A pin 41, driven through the hole 39 into the recess40, will serve to lock the toe-calk in place. When it is desired toremove the toe-calk, a sharp blow in the direction away from thestop-shoulders 28 and 30 Will cut the pin 41 and the portion Whichremains in the toe-calk may be pushed out, and the portion remaining inthe recess of the horseshoe may be removed by a blow upon the under faceof the toe portion of the shoe. Of course the hole 39 and the recess 40will be so positioned that when they register or are in alinement toreceive the pin the parts will be in wedged position, as abovedescribed.

The form of toe-calk so far described presents a plurality ofinterlocking parts or ribs in different planes, so that there is nopossibility of the calk becoming dislodged when the horse stumbles orstrikes an obstruction.

Each heel portion or end of the horseshoe is thickened, and saidthickened portion has its sides tapering forward, as clearly shown inFig. 1. The said thickened portion is provided with an inclined face 42,havin grooves 43 in its sides. A stop or shoul" er 44 is formed at theend of the thickened portion. The body 45 of the heel-calk has a facewhich fits the inclined face 42 of the shoe, and the sides of thetoe-calk extend down over the sides of the wedge-shaped thickenedportion of the shoe and are formed with side ribs 47 to engage thegrooves 43 of the shoe. The toe-calk is also provided with a recess 46at its end to fit the stop 44 of the shoe and with a lug 48 at its frontend, said lug having a hole 49. The shoe is formed with a recess 50 toreceive a pin 51 driven through the hole 48 into said recess. Said holeand recess are so positioned that when registering with each other or inalinement to receive the pin 51 the heel-calk is wedged firmly in place,this feature being the same as that comprising the hole 39, recess 40,and pin 41, employed in connection with the toe-calk. The sharpenedportion of the heel-calk is represented at 52. As shown in Fig. 2, theinclined meeting faces of the shoe and heel calks are such that theweight of the horse or a pulling movement tends to move the heel-calktoward the rear; but this movement only serves to wedge the heel-calkmore firmly in place, if such movement could be permitted by the stop 44or the in 51. incline meeting faces, the wedging interlocking sides, thestop 44, and the lockingpin 51 serves to hold the heel-calks withabsolute firmness; yet they can be readily removed by striking themsharply at the rear, so as to cut the pin 51, after which the portionsof the pin can be removed in the same manner as above described inconnection with the pin 41.

Each calk, as will be observed, has a wide base which embracescorrespondingly-formed portions of the shoe and bears on fiat surfacesin different planes, and therefore insures a permanent connection whichrenders it impossible for the calk to become accidentally displaced byany lateral blOW or pressure tending to spread the interlocking members.As shown in Figs. 2 and 8, the lips or ribs 34 and 35 of the toe-calkare widely separated from each other and embrace the parts of the shoewith which they interlock, allportions of the face of said calk betweensaid ribs bearing against correspondingly-formed supportin -faces of theshoe, and the lower faces of said ribs are flat and engage similar facesof the body of the shoe. The upper and lower faces of the ribs 31 and 36are also flat and bear on similar faces of the body of the shoe inplanes different from each other and from the plane of the ribs 34 and35. This wide base and the flat bearings in different planes and theinclosing grasp taken by the ribs of said calk prevent any liability ofdisplacement either by a stumbling blow against an obstruction or by afull-strength pull forward.

As shown in Figs. 4 and 5, the side ribs 47 of each heel-calk are widelyseparated from each other and embrace the parts of the shoe with whichthey interlock and have fiat up per faces which bear on similar faces ofthe body of the shoe, and the flat face of the calk between said ribsbears against a correspondingly-formed supporting-face of the body ofthe shoe in a different plane from that of the bearing of the ribs 47.The resultin wide base-bearing and grasp of the heel-cal like that ofthe toe-calk, and flat bearings in different planes renders itimpossible to displace the calk by a lateral blow or pressure.

In Figs. 12 to 20, inclusive, the construction is identical with that sofar described, excepting that the calks are provided with rubber padsinstead of sharp ribs. The interlocking portions of the shoe and calksshown in Figs. 12 to 20 are the same as in Figs. 1 to 10. Therefore thesame reference characters are employed in Figs. 12 to 20 for those partswhich are identical with the other form.

The body of the padded toe-calk is represented at 330, and the body ofthe padded heel-calk is indicated at 450. These bodies are formed.thicker than the calks 33 and 45 The combined action of the and arechambered to receive the rubber cushions or pads 53. The walls of thechambers are turned inwardly, as at 54, so as to retain the rubber morefirmly in said chambers, and the bottom of each chamber is formed with ahole or holes 55. At the end of the hole opposite the rubber-filledchamber the body of the calk is formed with a shallow recess 56. Aportion of the rubber extends through the hole 55 to form a stem 57, andthe end of said stem is formed with a head or flange 58, fitting therecess 56. Said stem and head serve to hold the cushion securely in itschamber. If the rubber is introduced into this chamber while in a softcondition and then vulcanized in place, a portion of the rubber willreadily pass through the hole and into the recess to form the stem 57and head 58; but if the rubber is molded and vulcanized prior toinsertion the head 58 may be folded or collapsed sufficiently so that itcan be pushed through the hole 55 and then allowed to expand in therecess 56. The padded toe-calk is preferably provided with an ear 59,having a hole to receive a pin 60, (see Fig. 12,) entering a suitablerecess in the body of the shoe, said pin 60 serving the same purpose asthe pin 41, above described. As indicated in Fig. 11, the interlockingmembers 29 and 35 may be omitted, the toe-calk being simply providedwith an outer rib 360, entering the front undercut recess 32. This formof calk has but two bearings and interlockin members instead of three,as in the other orms; but the interlocking parts are in different planesand will serve for light travel. When the calk is formed with but twointerlocking ribs instead of three, as shown in this figure, I prefer toform the web or body of the calk flat and inclined, as shown in saidfigure, instead of curved, as in the other figures, and of course theface of the shoe against which the calk bears will be similarly flat andinclined.

It will now be understood that since the sharpened calks and the paddedcalks are identical so far as their ribs and recesses are concerned theymay be readily substituted for each other in connection with a singlehorseshoe or base, such change being made according to the condition ofthe roadways or the season of the year without requiring the services ofa-blacksmi th and the removal of nails from the hoof of the animal anddriving new nails or the shaping of new shoes to fit the hoof of theanimal.

I claim 1. A horseshoe having a removable calk,

the said shoe and calk having interlocking parts formed to be engaged bymovement in the direction of the curve of the horseshoe, the said calkhaving a wide base with marginal portions embracing and closely fittingcorrespondingly-formed portions of the shoe, and having a centralbearing and parallel side bearings in a diflerent plane from that of thecentral bearing.

2. A horseshoe having removable toe and heel calks, the said shoe andcalks having wedge-shaped interlocking portions formed to opposemovement of the calks along the body of the shoe, the said calks havingwide bases with marginal portions embracing and closely fittingcorrespondingly-formed portions of the shoe, and the said body and calkshaving fiat parallel bearing-faces in different planes.

3. A horseshoe-body having a removable calk, provided with a pluralityof interlocking ribs and grooves having flat parallel bearing-faces indifierent planes, said ribs and grooves bein wedge-shaped in thedirection of their length 4. A horseshoe-body having a removable calk,provided with a plurality of horizontally-proj ecting interlocking ribsand grooves in different planes, said body and calk being longitudinallywedge-shaped in form.

5. The combination with a horseshoe having inner and outer andintermediate ribs projecting horizontally from the toe portion thereof,of a toe-calk formed to engage said ribs.

6. The combination with a horseshoe hav-- ing inner and outer andintermediate ribs projecting horizontally from the toe portion thereof,of a toe-calk formed to engage said ribs, and means for locking theparts together when engaged.

7. The combination with a horseshoe having inner and outer andintermediate ribs projecting horizontally from the toe portion thereof,of a toe-calk formed to engage said ribs, and means for locking theparts together when engaged, said means comprising a pin uniting thecalk and body of the shoe.

8. The combination with a horseshoe, of a removable toe-calk having asharpened edge at each end, and a sharpened intermediate recessedportion.

In testimony whereof I have affixed my signature in presence of twowitnesses.

WILLIAM E. SHAW. Witnesses A. W; HARRISON, E. BATOHELDER IIO

